0027226: Mesh - Meshing algorithm fails if edge curves has small defects (bends, loops...)

ID	Project	Category	View Status	Date Submitted	Last Update

0027226	Open CASCADE	OCCT:Mesh	public	2016-03-04 12:26	2020-08-28 15:45

Reporter	~~ifv~~	Assigned To	oan
Priority	high	Severity	minor
Status	assigned	Resolution	open
Target Version	Unscheduled

Summary	0027226: Mesh - Meshing algorithm fails if edge curves has small defects (bends, loops...)
Description	Meshing algorithms used in BRepMesh package do not seem to take in account vertex or edge tolerances when takes tesselation points of edge curve for using them as triangulation nodes. Sometimes it leads to bad diagnistic (ex. SelfIntersectingWire) and failure of meshing algorithm if curve has small defects (bends, loops) covered by tolerance edge or vertex. This problem appears for branch CR27108 (branch dedicated modification of GCPnts_TangentialDeflection algorithm) and causes regression of tests: bugs modalg_2 bug397 bugs moddata_1 bug22759 (Linux only) mesh standard_incmesh C7, V3 mesh standard_incmesh_parallel C7, V3 mesh standard_mesh C7, V3 mesh standard_shading V3
Steps To Reproduce	Run tests
Tags	No tags attached.

Test case number

~~abv~~ 2016-03-11 16:13 manager ~0051554	Note that this issue is regression, hence set to high priority

git 2016-04-01 15:13 administrator ~0052294	Branch CR27226 has been created by oan. SHA-1: 6d9f7546a6d551d06cf619ee20376a83aed9c60b Detailed log of new commits: Author: oan Date: Fri Apr 1 14:30:15 2016 +0300 0027226: Meshing algorithm fails if edge curves has small defects (bends, loops...) Take into account tolerance of edge vertices in order to reduce density of discretization points.

oan 2016-04-01 15:21 developer ~0052297	Dear Mikhail, branch CR27226 has been created on top of the CR27108 one and implements functionality refusing discretization points that are within tolerance of edge vertices. Could you please review.

oan 2016-04-01 16:00 developer ~0052301	Dependency of 0027239 has been added due to indicate relations in Git repository in order to test the bump of patches #27108 + 0027226 + 0027239. There is no other relation of this issue to 0027239. Note that branch 0027239 should be used for test campaign as far as it contains all mentioned patches.

~~msv~~ 2016-04-26 11:02 developer ~0053575	Reviewed.

git 2016-04-26 11:40 administrator ~0053583	Branch CR27226 has been updated forcibly by mkv. SHA-1: 495cb861dce528f5606527f9b7892015a9828bc9

~~mkv~~ 2016-04-26 16:25 tester ~0053604	Dear BugMaster, Branch CR27226 was rebased on current master of occt git-repository. SHA-1: 495cb861dce528f5606527f9b7892015a9828bc9

~~mkv~~ 2016-04-26 16:26 tester ~0053605	Dear BugMaster, Branch CR27226 from occt git-repository (and master from products git-repository) was compiled on Linux, MacOS and Windows platforms and tested on Release mode. SHA-1: 495cb861dce528f5606527f9b7892015a9828bc9 Number of compiler warnings: occt component : Linux: 0 (0 on master) Windows: 0 (0 on master) MacOS : 0 (0 on master) products component : Linux: 72 (72 on master) Windows: 4 (4 on master) MacOS : 1131 Regressions/Differences/Improvements: http://occt-tests/CR27226-master-OCCT/Debian70-64/summary.html http://occt-tests/CR27226-master-OCCT/Windows-64-VC10/summary.html Improvements: bugs modalg_2 bug287,bug397 mesh advanced_incmesh A9, B1, B2, B3, B7 mesh advanced_incmesh_parallel A9, B1, B2, B3, B7 mesh advanced_mesh A9, B1, B2, B3, B7 mesh advanced_shading A9, B1, B2, B3, B7 mesh standard_incmesh C7, V3 mesh standard_incmesh_parallel C7, V3 mesh standard_mesh C7, V3 mesh standard_shading V3 Failed: bugs iges buc60820_2, buc60823, bug306 bugs mesh bug25307 mesh standard_incmesh U2, W5, W7 mesh standard_incmesh_parallel U2, W5,W7 mesh standard_mesh U2, W5, W7 mesh standard_shading U2, W4, W5 http://occt-tests/CR27226-master-Products/Debian70-64/summary.html http://occt-tests/CR27226-master-Products/Windows-64-VC10/summary.html Failed: bfit pnt100 A1, A2, A3, A5, A6 bfit pnt1000 A1, A2, A3, A4, A5, A6 bfit pnt10000 A1, A2, A3, A4, A5, A6 omf advanced_meshcut M4, U3, Z1, Z2, Z3 omf advanced_meshfuse F4, O1, O2, O3, ZD4 Testing cases: http://occt-tests/CR27226-master-OCCT/Debian70-64/bugs/modalg_2/bug397.html http://occt-tests/CR27226-master-OCCT/Windows-64-VC10/bugs/modalg_2/bug397.html bugs modalg_2 bug397 : IMPROVEMENT http://occt-tests/CR27226-master-OCCT/Debian70-64/bugs/moddata_1/bug22759.html bugs moddata_1 bug22759 (Linux only) http://occt-tests/CR27226-master-OCCT/Debian70-64/mesh/standard_incmesh/C7.html http://occt-tests/CR27226-master-OCCT/Debian70-64/mesh/standard_incmesh/V3.html http://occt-tests/CR27226-master-OCCT/Windows-64-VC10/mesh/standard_incmesh/C7.html http://occt-tests/CR27226-master-OCCT/Windows-64-VC10/mesh/standard_incmesh/V3.html mesh standard_incmesh C7, V3: IMPROVEMENT http://occt-tests/CR27226-master-OCCT/Debian70-64/mesh/standard_incmesh_parallel/C7.html http://occt-tests/CR27226-master-OCCT/Debian70-64/mesh/standard_incmesh_parallel/V3.html http://occt-tests/CR27226-master-OCCT/Windows-64-VC10/mesh/standard_incmesh_parallel/C7.html http://occt-tests/CR27226-master-OCCT/Windows-64-VC10/mesh/standard_incmesh_parallel/V3.html mesh standard_incmesh_parallel C7, V3: IMPROVEMENT http://occt-tests/CR27226-master-OCCT/Debian70-64/mesh/standard_mesh/C7.html http://occt-tests/CR27226-master-OCCT/Debian70-64/mesh/standard_mesh/V3.html http://occt-tests/CR27226-master-OCCT/Windows-64-VC10/mesh/standard_mesh/C7.html http://occt-tests/CR27226-master-OCCT/Windows-64-VC10/mesh/standard_mesh/V3.html mesh standard_mesh C7, V3: IMPROVEMENT http://occt-tests/CR27226-master-OCCT/Debian70-64/mesh/standard_shading/V3.html http://occt-tests/CR27226-master-OCCT/Windows-64-VC10/mesh/standard_shading/V3.html mesh standard_shading V3: IMPROVEMENT Testing on Linux: occt component : Total MEMORY difference: 87230117 / 87953611 [-0.82%] Total CPU difference: 18994.920000000013 / 19052.160000000054 [-0.30%] products component : Total MEMORY difference: 27404469 / 27481797 [-0.28%] Total CPU difference: 5293.859999999987 / 5313.84999999999 [-0.38%] Testing on Windows: occt component : Total MEMORY difference: 54931828 / 55049509 [-0.21%] Total CPU difference: 17853.752846398787 / 18156.97199009883 [-1.67%] products component : Total MEMORY difference: 18669157 / 18690889 [-0.12%] Total CPU difference: 5157.25265909995 / 5258.325706999966 [-1.92%] There are following differences in images found by testdiff. http://occt-tests/CR27226-master-OCCT/Debian70-64/diff-Debian70-64.html http://occt-tests/CR27226-master-OCCT/Windows-64-VC10/diff-Windows-64-VC10.html IMAGE mesh standard_incmesh B9: B9.png differs IMAGE mesh standard_incmesh S8: S8.png differs IMAGE mesh standard_shading W7: W7.png differs IMAGE mesh standard_shading S8: S8.png differs IMAGE bugs step bug5708: bug5708.png differs IMAGE bugs vis buc60858: buc60858.png differs IMAGE bugs modalg_2 bug21415: bug21415.png differs http://occt-tests/CR27226-master-Products/Debian70-64/diff-Debian70-64.html http://occt-tests/CR27226-master-Products/Windows-64-VC10/diff-Windows-64-VC10.html IMAGE parasolid read D3: D3.png differs

~~mkv~~ 2016-04-26 16:26 tester ~0053606	Dear oan, Branch CR27226 has been rejected due to: - regressions/differences/improvements - differences in images

git 2019-11-07 13:03 administrator ~0088776	Branch CR27226_1 has been created by oan. SHA-1: 9cd0c77e152ba53ff76b4d2c2a1e9de7e7614244 Detailed log of new commits: Author: oan Date: Thu Nov 7 12:25:57 2019 +0300 0027226: Meshing algorithm fails if edge curves has small defects (bends, loops...) Take into account tolerance of edge vertices in order to reduce density of discretization points.

Date Modified	Username	Field	Change
2016-03-04 12:26	~~ifv~~	New Issue
2016-03-04 12:26	~~ifv~~	Assigned To	=> msv
2016-03-04 12:28	~~ifv~~	Description Updated
2016-03-04 15:30	~~msv~~	Assigned To	msv => oan
2016-03-11 16:13	~~abv~~	Note Added: 0051554
2016-03-11 16:13	~~abv~~	Priority	normal => high
2016-04-01 15:12	oan	Status	new => assigned
2016-04-01 15:13	git	Note Added: 0052294
2016-04-01 15:21	oan	Note Added: 0052297
2016-04-01 15:21	oan	Assigned To	oan => msv
2016-04-01 15:21	oan	Status	assigned => resolved
2016-04-01 15:55	oan	Relationship added	parent of 0027239
2016-04-01 16:00	oan	Note Added: 0052301
2016-04-26 11:02	~~msv~~	Note Added: 0053575
2016-04-26 11:02	~~msv~~	Assigned To	msv => bugmaster
2016-04-26 11:02	~~msv~~	Status	resolved => reviewed
2016-04-26 11:28	~~mkv~~	Assigned To	bugmaster => mkv
2016-04-26 11:40	git	Note Added: 0053583
2016-04-26 16:25	~~mkv~~	Note Added: 0053604
2016-04-26 16:26	~~mkv~~	Note Added: 0053605
2016-04-26 16:26	~~mkv~~	Note Added: 0053606
2016-04-26 16:26	~~mkv~~	Assigned To	mkv => oan
2016-04-26 16:26	~~mkv~~	Status	reviewed => assigned
2016-10-26 18:10	oan	Target Version	7.1.0 => 7.2.0
2017-07-20 12:43	oan	Target Version	7.2.0 => 7.3.0
2018-02-25 21:09	~~abv~~	Target Version	7.3.0 => 7.4.0
2019-09-04 17:56	kgv	Summary	Meshing algorithm fails if edge curves has small defects (bends, loops...) => Mesh - Meshing algorithm fails if edge curves has small defects (bends, loops...)
2019-09-06 16:15	oan	Target Version	7.4.0 => 7.5.0
2019-11-07 13:03	git	Note Added: 0088776
2020-08-28 15:45	oan	Target Version	7.5.0 => Unscheduled

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